Interface SqlRexContext

    • Method Detail

      • convertExpression

        RexNode convertExpression​(SqlNode expr)
        Converts an expression from SqlNode to RexNode format.
        expr - Expression to translate
        Converted expression
      • getGroupCount

        int getGroupCount()
        If the operator call occurs in an aggregate query, returns the number of columns in the GROUP BY clause. For example, for "SELECT count(*) FROM emp GROUP BY deptno, gender", returns 2. If the operator call occurs in window aggregate query, then returns 1 if the window is guaranteed to be non-empty, or 0 if the window might be empty.

        Returns 0 if the query is implicitly "GROUP BY ()" because of an aggregate expression. For example, "SELECT sum(sal) FROM emp".

        Returns -1 if the query is not an aggregate query.

        0 if the query is implicitly GROUP BY (), -1 if the query is not and aggregate query
        See Also:
      • getSubQueryExpr

        RexRangeRef getSubQueryExpr​(SqlCall call)
        Returns the expression used to access a given IN or EXISTS sub-query.
        call - IN or EXISTS expression
        Expression used to access current row of sub-query
      • getInitializerExpressionFactory

        InitializerExpressionFactory getInitializerExpressionFactory()
        Returns the factory which supplies default values for INSERT, UPDATE, and NEW.
      • getValidator

        SqlValidator getValidator()
        Returns the validator.